const config = @import("config");
const build_helpers = @import("build_helpers");

pub const syscall1 = switch (config.arch) {
    .aarch64 => Aarch64.syscall1,
    .amd64 => Amd64.syscall1,
    .riscv64 => Riscv64.syscall1,
};

const Aarch64 = struct {
    pub fn syscall1(number: usize, arg1: usize) usize {
        return asm volatile ("svc #0"
            : [ret] "={x0}" (-> usize),
            : [number] "{x8}" (number),
              [arg1] "{x0}" (arg1),
            : .{ .memory = true });
    }
};

const Amd64 = struct {
    pub fn syscall1(number: usize, arg1: usize) usize {
        return asm volatile ("syscall"
            : [ret] "={rax}" (-> usize),
            : [number] "{rdi}" (number),
              [arg1] "{rsi}" (arg1),
            : .{ .rcx = true, .r11 = true });
    }
};

const Riscv64 = struct {
    pub fn syscall1(number: usize, arg1: usize) usize {
        return asm volatile ("ecall"
            : [ret] "={x10}" (-> usize),
            : [number] "{x17}" (number),
              [arg1] "{x10}" (arg1),
            : .{ .memory = true });
    }
};